#teacherSay{
  *{
    box-sizing: border-box;
  }
  .menuwrapper{
    height: 44px;
    max-width: 640px;
    min-width: 320px;
    width:100%;
    position: fixed;
    top:0;
    background: white;
    z-index: 3;
  }
  .menu{
    height:44px;
    display: flex;
    background: white;
    text-align: center;
    justify-content: center;
    align-items: center;
    border-bottom: 1px solid #f2f2f2;
  }
  .btn{
    flex:1;
    -webkit-flex: 1;
    color: rgb(153,153,153);
    padding: 7px 0;
    border-right: 1px solid rgb(242,242,242);
  }
  .item{
    box-sizing: border-box;
    padding: 16px;
    background: white;
    margin-bottom: 12px;
  }
  .page{
    box-sizing: border-box;
    padding-top: 54px;
  }
  .avatar{
    height: 36px;
    width: 36px;
    border-radius: 50%;
    position: absolute;
    left: 0;
    top: 0;
  }
  button.follow{
    background: transparent;
    border: 1px solid rgb(0,118,219);
    color: rgb(0,118,219);
    border-radius: 4px;
    width: 60px;
    height: 22px;
    line-height: 1;
    position: absolute;
    right: 4px;
    top: 0;
  }
  .teacherInfo{
    box-sizing: border-box;
    padding-left:40px;
    position: relative;
    height: 36px;
  }
  span.name{
    font-size: 16px;
    color: rgb(153,153,153);
    line-height: 36px;
  }
  span.name.small{
    font-size: 14px;
    line-height: 1;
    color: rgb(102,102,102);
  }
  span.name.small,time{
    display: block;
    line-height: 1.45;
  }
  time{
    color: rgb(153,153,153);
  }
  .introduce{
    padding-left: 40px;
    color: rgb(102,102,102);
    text-align: justify;
    line-height: 18px;
  }
  .inner{
    justify-content: center;
    align-items: center;
    height: 100%;
  }
  .videoIntro{
    p{
      font-size: 14px;
      line-height: 20px;
      margin: 5px;
    }
    video{
      width:100%;
      height:r(320);
    }
  }
  .videoBox,video{
    width:100%;
    height:r(320);
  }
  .videoBox{
    position: relative;
  }
  legend{
    position: absolute;
    width:100%;
    height: 30px;
    background: rgba(0,0,0,.7);
    bottom: 0;
    left:0;
  }
  .audioBox{
    width:100%;
    height: r(220);
    position: relative;
  }
  .audioWrapper{
    height: 100%;
    width:100%;
  }
  .articlelegend{
    height: 40px;
  }
  .articleBox{
    height: r(360);
    width: 100%;
    position: relative;
  }
  .page{
    display: none;
  }
  .show{
    display: block;
  }
  #homebtn .item:nth-child(3){
    background: url('../images/icon_3_active.png') center center/ auto 36px no-repeat;
  }
}